package com.atguigu.springcloud.controller;

import com.atguigu.springcloud.entities.CommonResult;
import com.atguigu.springcloud.entities.Payment;
import com.atguigu.springcloud.lb.LoadBalancer;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.discovery.DiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalancerClient;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;

import javax.annotation.Resource;
import java.net.URI;
import java.util.List;

/**
 * @auther zzyy
 * @create 2020-01-28 16:22
 */
@RestController
public class OrderController
{
    public static final String PAYMENT_SRV = "http://localhost:8001";
    //public static final String PAYMENT_SRV = "http://CLOUD-PAYMENT-SERVICE";

    @Resource
    private RestTemplate restTemplate;
    //可以获取注册中心上的服务列表
    @Resource
    private DiscoveryClient discoveryClient;
    @Resource
    private LoadBalancer loadBalancer;

    @Resource
    private LoadBalancerClient loadBalancerClient;

    @GetMapping("/consumer/payment/create")
    public CommonResult<Payment> create(Payment payment)
    {
        return restTemplate.postForObject(PAYMENT_SRV+"/payment/create",payment,CommonResult.class);

        //return restTemplate.postForEntity(PAYMENT_SRV+"/payment/create", payment, CommonResult.class).getBody();
    }

    @GetMapping("/consumer/payment/get/{id}")
    public CommonResult<Payment> getPayment(@PathVariable("id") Long id)
    {
        return restTemplate.getForObject(PAYMENT_SRV+"/payment/get/"+id,CommonResult.class);
    }

    @GetMapping("/consumer/payment/getForEntity/{id}")
    public CommonResult<Payment> getPayment2(@PathVariable("id") Long id)
    {
        ResponseEntity<CommonResult> entity = restTemplate.getForEntity(PAYMENT_SRV+"/payment/get/"+id, CommonResult.class);
        if(entity.getStatusCode().is2xxSuccessful()){
            return entity.getBody();
        }else {
            return new CommonResult(444, "操作失败");
        }
    }

    @GetMapping("/consumer/payment/lb")
    public String getPaymentLB()
    {
        List<ServiceInstance> instances = discoveryClient.getInstances("CLOUD-PAYMENT-SERVICE");

        if(instances == null || instances.size()<=0) {
            return null;
        }

        ServiceInstance serviceInstance = loadBalancer.instances(instances);
        URI uri = serviceInstance.getUri();

//        ServiceInstance serviceInstance = loadBalancerClient.choose("demo-client");
//        String url = "http://" + serviceInstance.getHost() + ":" + serviceInstance.getPort() + "/dc";
//        System.out.println(url);
//        return restTemplate.getForObject(url, String.class);

        return restTemplate.getForObject(uri+"/payment/lb",String.class);
    }

    @GetMapping("/consumer/payment/zipkin")
    public String paymentZipkin()
    {
        String result = restTemplate.getForObject("http://localhost:8001"+"/payment/zipkin/", String.class);
        return result;
    }
}
